Xinhua News Agency, Frankfurt, July 13 (International observation) Multiple factors cause the euro exchange rate to fall Xinhua News Agency reporter Shan Weiyi Shao Li In the past three weeks, the exchange rate of the euro against the U.S. dollar has continued to fall, and on the 12th in the European foreign exchange market, it even fell to the lowest point in nearly 20 years, 1 euro to 1